Construction standard and cost of vegetable greenhouse

The vegetable greenhouse generally uses a skeleton of bamboo structure or steel structure, which is covered with one or more layers of thermal insulation plastic film, thus forming a greenhouse space, and the outer film can well prevent the loss of carbon dioxide produced by the growth of internal vegetables. so that the greenhouse has a good heat preservation effect, let's take a look at the vegetable greenhouse construction standards and costs!

Standard for construction of vegetable greenhouse

To build a vegetable greenhouse, we should choose a suitable site, which should be built in a place away from the wind and the sun, with fertile soil, good light and ventilation, and no buildings around. The specific requirements are

1. Site location conditions: the greenhouse is a fixed facility with a large investment and a long service life, so it should be built centrally in order to facilitate management.

2. Lighting and ventilation conditions: the sun is the main light in the greenhouse. As for the heat source, the site with sufficient lighting conditions must be selected to build a shed.

3. Water level measurement: the construction mode of greenhouse is different in different areas, and it is not suitable to build digging greenhouse in areas where the water level is too shallow.

4. Soil quality measurement: it is necessary to measure the soil composition in advance at the beginning of the construction of the shed, so as to facilitate the selection of varieties and formula fertilization in the later stage.

5. Soil and water conservancy conditions: vegetable cultivation in greenhouse is generally multi-stubble three-dimensional planting, therefore, good soil and water conservancy conditions are required.

Construction cost of vegetable greenhouse

1, 6 meters wide prefabricated steel frame greenhouse: this type of shed has been implemented and applied for many years. It is mainly based on galvanized thin-walled steel pipes with a diameter of 22mm and a thickness of 1.2mm. It is a steel shed with a width of 6m, a top height of 2.2m and a shoulder height of 1.2m. The usage rate is 80%, the service life is more than 10 years, the cost per square meter is 10-30 yuan, and the construction cost is 7000-20000 yuan per mu. Suitable for planting vegetables, flowers and so on, the defects are small shed width, low efficiency of operation and management, and weak thermal insulation in winter.

2. Simple bamboo shed: it is a widely used variety, with a width of 5-6 meters, a top height of 2-3.2 meters, a side height of 1-1.2 meters, and an arch spacing of 1-1.1 meters. The advantages are low cost, easy to take materials, easy to build, the cost per mu is about 3000 yuan (even film), and the defect is that there are many columns in the greenhouse, high shading rate, inconvenient operation, short service life and poor resistance to wind and snow. Among them, there is a kind of shed type commonly known as "ground roll dragon", with a span of 4-6 meters, top height above and below the shoulder, using a film to cover the end, which is more cost-effective than the ordinary bamboo and vegetable greenhouse, and is suitable for climbing crop cultivation, and watermelon cultivation in the greenhouse is widely used.

3. Steel-bamboo mixed greenhouse: the structure of the shed is the same as that of the simple bamboo greenhouse, and the steel pipe and bamboo pole are used as arch bars at a distance, which has the advantages of saving steel, reducing cost, convenient operation and so on, and has a certain application area; the performance and cost are between the steel greenhouse and the bamboo greenhouse.

4, 8 meters wide progressive steel frame greenhouse: it increases the height and width of the shed body, improves the height and width of the ventilation window on the side of the shed, increases the space in the shed, improves the management efficiency and winter insulation, and improves the earth-sky rate. The shed is made of galvanized tubes with a diameter of 28-32 mm and a thickness of 1.5 mm; with a top height of 3.2-3.5 meters and a shoulder height of 1.8 meters, the shed has large space, which is suitable for growing high vine vegetables. However, the construction cost of this vegetable greenhouse has improved greatly, with a cost of about 20-45 yuan per square meter and a cost of 1.5-30,000 yuan per mu, which is mainly suitable for agricultural demonstration parks and vegetable farmers with certain economic strength.

5. Ordinary multi-span greenhouse and simple bamboo frame multi-span greenhouse: the structure of ordinary multi-span greenhouse is similar to that of steel frame multi-span greenhouse, which has the advantages of large space and high utilization rate of earth and weather, but the cost is much lower, 50-100 yuan per square meter.

Construction process of vegetable greenhouse

The construction process of vegetable greenhouse is relatively simple and the technology is relatively fine. The vegetable supply in our country is mainly planted in the vegetable greenhouse, so the construction quality and design structure of the vegetable greenhouse directly affect the output and quality of vegetables in our country.

1. Theme design: it mainly sets the length, width and height of the vegetable greenhouse, and designs and makes it according to the planting area. The ordinary greenhouse in our country is about 120 square meters.

2. Selection and purchase materials: the construction of vegetable greenhouse is divided into column type and steel frame type. All the steel frames used in the steel frame type are welded, and only the foundation needs to be strengthened. The pillar vegetable greenhouse should be made of cement columns or bamboo. The service life of the steel frame greenhouse is relatively long, the longest can be used for 25 years, and the pillar vegetable greenhouse can be used for 3-5 years.

3. Matrix construction: the weighing rear wall should be built in the vegetable greenhouse with pillar type, and the width of the wall is not less than 50 cm. And set up a special vent.

4. Arch frame: the vegetable greenhouse with steel frame does not need to be erected with arch, but the vegetable greenhouse with bamboo pole or pillar should be built with arch. It is necessary to use a uniform bamboo pole with a diameter of more than 2 cm, insert the big end of the bamboo pole on the back wall, and fix both ends. Keep the arch consistent and highly balanced. And erect a column at the highest point of the arch to support it.

5. Plastic film laying: a good transparent plastic film should be selected for laying, with no dripping film or purple light as the first choice. Plastic should be buried deep on both sides of the greenhouse. The thickness of the deep burial is not less than 20 cm.